I have recreated the error, it occurs when using both randomize and choice_filter:
(setting getter-only property "message")
Here's the thread about the release of the feature: Randomizing Lists or Questions within Groups - #4 by LN
Maybe the core team will be able to please provide some insight on if the randomize=true parameter can be combined with a choice_filter? @Grzesiek2010? Note that this is not the same Issue with randomize=true which was trying to use randomize with or_there.